English verb conjugation
CAN BACKFLIP

Regular verb: backflip - backfliped - backfliped

Affirmation

Simple form	V-ing form
I can backflip you can backflip he can backflip we can backflip you can backflip they can backflip	I can be backfliping you can be backfliping he can be backfliping we can be backfliping you can be backfliping they can be backfliping
Perfect	V-ing perfect
I can have backfliped you can have backfliped he can have backfliped we can have backfliped you can have backfliped they can have backfliped	I can have been backfliping you can have been backfliping he can have been backfliping we can have been backfliping you can have been backfliping they can have been backfliping

Negation

Simple form	V-ing form
I can't backflip you can't backflip he can't backflip we can't backflip you can't backflip they can't backflip	I can't be backfliping you can't be backfliping he can't be backfliping we can't be backfliping you can't be backfliping they can't be backfliping
Perfect	V-ing perfect
I can't have backfliped you can't have backfliped he can't have backfliped we can't have backfliped you can't have backfliped they can't have backfliped	I can't have been backfliping you can't have been backfliping he can't have been backfliping we can't have been backfliping you can't have been backfliping they can't have been backfliping

Interrogative form

Simple form	V-ing form
can I backflip? can you backflip? can he backflip? can we backflip? can you backflip? can they backflip?	can I be backfliping? can you be backfliping? can he be backfliping? can we be backfliping? can you be backfliping? can they be backfliping?
Perfect	V-ing perfect
can I have backfliped? can you have backfliped? can he have backfliped? can we have backfliped? can you have backfliped? can they have backfliped?	can I have been backfliping? can you have been backfliping? can he have been backfliping? can we have been backfliping? can you have been backfliping? can they have been backfliping?

Interro-negative form

Simple form	V-ing form
can't I backflip? can't you backflip? can't he backflip? can't we backflip? can't you backflip? can't they backflip?	can't I be backfliping? can't you be backfliping? can't he be backfliping? can't we be backfliping? can't you be backfliping? can't they be backfliping?
Perfect	V-ing perfect
can't I have backfliped? can't you have backfliped? can't he have backfliped? can't we have backfliped? can't you have backfliped? can't they have backfliped?	can't I have been backfliping? can't you have been backfliping? can't he have been backfliping? can't we have been backfliping? can't you have been backfliping? can't they have been backfliping?